›› 2013, Vol. 34 ›› Issue (3): 783-790.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of additional load on adjacent pile foundation induced by double-o-tube shield tunnel construction

WEI Xin-jiang1, 2，HONG Jie1，WEI Gang2   

  1. 1. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China； 2. Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China
  • Received:2012-02-07 Online:2013-03-11 Published:2013-03-20

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Abstract: Based on the source-sink method, a three-dimensional additional stress formula caused by double-o-tube (DOT) shield tunnel construction soil loss is derived. The additional load caused by additional bulkhead pressure, the friction between soil and shield shell, and soil loss is added to study the total distribution of additional stress on adjacent underground pile foundation. The results show that, the additional squeeze pressure stress is caused in front of the excavation face, while the additional negative tension stress is caused in back of the excavation face. The greater pressure and tensile stresses occur near the depth of DOT shield tunnel axis. The friction between soil and shield shell plays a dominant role in total additional load, especially in the y-direction. The additional load in direction perpendicular to the segment is larger than the additional load in driving direction but has less range of influence. The additional load is small in the vertical direction, which has the opposite direction additional load near the tunnel axis compared to the additional load at each ends and its curve likes bow-shaped distribution. By the comparison with the results of numerical simulation, centrifuge experiments and field measurement, it is proved that the research on influence of DOT shield tunnel excavation on neighboring piles is reliable through analytical analysis.

Key words: double-o-tube (DOT) shield tunnel, pile foundation, additional bulkhead pressure, friction, soil loss, additional load

CLC Number: 

  • U 455
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